Finnish secret: How to properly paint rusty metal to make it last for decades?

I have a friend Sasha. A very smart and interesting person! But scandalous creepy. We have been friends with him for many years, we are accustomed to the emotionality of each other. But once we agreed that we would not overlap in our work! Otherwise, the friendship is over. We communicate by this principle. We help each other in small things, but we step back in global issues.

So a few years ago Sasha bought himself a plot and decided to build a house. At that time I was engaged in construction from timber and logs. But he didn't build for him) and he didn't want to. He is a wealthy man and decided that he wants a big house using Finnish technology. As a result, I decided that only builders from Finland can build a good Finnish house. He turned to them! It's good that the site is closer to Finland, and not to Vladivostok))

Finnish builders issued an invoice - about a thousand euros per 1 sq. M! Very expensive! At the same time, they gave a good guarantee - about 20 years!
But in order to provide a guarantee, it is necessary that every detail of the house is made accurately and efficiently.

I delayed the introduction! Now let's move on to painting the rusty structures!

The Finns brought the house kit and built the house in a couple of weeks! The foundation was laid in advance by our local craftsmen. And Sasha ordered an entrance staircase in advance. Finnish builders only offered a wooden porch and railings. And Sasha basically wanted forged. Therefore, I ordered it strongly in advance - more than half a year before meeting with Finnish craftsmen.

As a result, the porch was left on the site, and it stood there all this time. The bad weather did its job, the stairs were covered with rust.

The question arose: how to paint a rusty staircase so that it will stand for 20 years?

The Finns said everything very clearly and clearly: "WILL NOT WORK"!) No paint - not the most expensive, not the cheapest can handle this!

As a result, after thinking everything over, the Finnish builders acted wisely, choosing the only correct solution! They decided that simply painting over the metal on top of the rust was not an option. The first thing to do is to prepare the surface for painting.

Therefore, the staining was carried out in several stages:

• Tore off the rust with metal brushes on a grinder;
• Degreased the surface;
• Primed;
• Painted with atmospheric enamel;
• Gave a 20-year guarantee for the house and all adjacent structures.

This is the only correct algorithm! Finnish craftsmen approached the matter with all responsibility! Most Russian builders would probably not bother, but simply applied paint, which would have disappeared in a few months!

So the main secret of Finnish craftsmen is a responsible attitude to business!